package cn.tedu.springmvc.util;

public class JsonResult<T> {
    private Integer state;  //业务返回码
    private String message; //消息
    private T data; //数据

    private JsonResult(){}
    public static JsonResult<Void> ok() {
        return ok(null);
    }

    public static <T> JsonResult<T> ok(T data) {
        JsonResult<T> jsonResult = new JsonResult<>();
        jsonResult.state = State.OK.getValue();
        jsonResult.data = data;
        return jsonResult;
    }

    public static JsonResult<Void> fail(State state, String message) {
        JsonResult<Void> jsonResult = new JsonResult<>();
        jsonResult.state = state.getValue();
        jsonResult.message = message;
        return jsonResult;
    }

    public enum State {
        OK(20000),
        ERR_USERNAME(40400),
        ERR_PASSWORD(40600);

        Integer value;

        State(Integer value) {
            this.value = value;
        }

        public Integer getValue() {
            return value;
        }
    }

}
